High pTp_{T} Inclusive Charged Hadron Spectra from Au+Au Collisions at sNN\sqrt{s_{NN}} = 200 GeV

The STAR Collaboration presents new measurements of inclusive charged hadron distributions for $p_{T} <$ 12 GeV/c from Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV. Charged hadron suppression at high $p_{T}$ is similar in shape and magnitude at all centralities to that observed previously at $\sqrt{s_{NN}}$ = 130 GeV for $p_{T} <$ 6 GeV/c. The ratio of spectra from central and peripheral Au+Au collisions shows that hadron suppression is approximately constant within 6 $< p_{T} <$ 12 GeV/c. The ratios of charged hadron spectra at the two beam energies show a 15-20% increase in yield at low $p_{T}$. At high $p_{T}$, the ratios show a larger increase that agrees well with pQCD calculations of the $\sqrt{s_{NN}}$ dependence of particle production in Au+Au collisions.Comment: 4 pages, 4 figures, Quark Matter 2002 Proceeding

Testing and Development of the Data Acquisition for the ALICE Experiment Fast Interaction Trigger Detector at the CERN Large Hadron Collider

The CERN Large Hadron Collider (LHC) collides charged nuclei of atoms to replicate the beginning of the universe: high-energy density environments of quarks, gluons, and leptons. The resulting particles released from the collisions provide insight to the behavior of the universe millionths of a second after the Big Bang. Capturing information about the particles released from the collisions require extreme precision that is provided by a project the ALICE team is collaborating on called the Fast Interaction Trigger (FIT). The FIT upgrades will replace the current triggers at the ALICE experiment, enabling selection of the most interesting collisions/ events that require further analysis. Our task is to become familiar with, edit the software for, and plot the results from a piece of equipment called the desktop digitizer. By using the digitizer to measure the signal from an Avalanche Photodiode, a type of photon detector, CERN physicists will be able to use these methods for the micro-channel-plate photomultiplier detectors involved in FIT. With the upgraded trigger detector, ALICE will be able make more accurate and precise measurements, furthering our knowledge about the high density matter from which our Universe evolved. CERN is where theory meets experiment for particle physics, and with new developments and upgrades such as FIT, yesterday’s hypotheses can become tomorrow’s knowledge

High pT hadron spectra at RHIC: an overview

Recent results on high transverse momentum (pT) hadron production in p+p, d+Au and Au+Au collisions at the Relativistic Heavy Ion Collider (RHIC) are reviewed. Comparison of the nuclear modification factors, $R_{dAu}(pT)$ and $R_{AA}(pT)$, demonstrates that the large suppression in central Au+Au collisions is due to strong final-state effects. Theoretical models which incorporate jet quenching via gluon Bremsstrahlung in the dense partonic medium that is expected in central Au+Au collisions at ultra-relativistic energies are shown to reproduce the shape and magnitude of the observed suppression over the range of collision energies so far studied at RHIC.Comment: 12 pages, 10 figures, Talk given at Hot Quarks 2004: Workshop for Young Scientists on the Physics of Ultrarelativistic Nucleus-Nucleus Collisions (HQ'04), Taos Valley, New Mexico, 18-24 Jul 2004, to be published in J. Phys.

Centrality evolution of the charged-particle pseudorapidity density over a broad pseudorapidity range in Pb-Pb collisions at root s(NN)=2.76TeV

Peer reviewe

High pT inclusive charged hadron spectra from Au+Au collisions at Sqrt(s_NN)=200 Gev

The STAR Collaboration presents new measurements of inclusive charged hadron distributions for p_T &lt; 12 GeV/c from Au+Au collisions at sqrt s_NN = 200GeV. Charged hadron suppression at high p_T is similar in shape and magnitude at all centralities to that observed previously at sqrt s_NN = 130 GeV for p_T &lt; 6 GeV/c. The ratio of spectra from central and peripheral Au+Au collisions shows that hadron suppression is approximately constant within 6 &lt; p_T &lt; 12 GeV/c. The ratios of charged hadron spectra at the two beam energies show a 15-20 percent increase in yield at low p_T. At high p_T, the ratios show a larger increase that agrees well with pQCD calculations of the sqrt s_NN dependence of particle production in Au+Au collisions

High pT inclusive charged hadron spectra from Au+Au collisions at {radical}(s{sub NN}) = 200 Gev

The STAR Collaboration presents new measurements of inclusive charged hadron distributions for p{sub T} &lt; 12 GeV/c from Au+Au collisions at {radical}(s{sub NN}) = 200GeV. Charged hadron suppression at high p{sub T} is similar in shape and magnitude at all centralities to that observed previously at {radical}(s{sub NN}) = 130 GeV for p{sub T} &lt; 6 GeV/c. The ratio of spectra from central and peripheral Au+Au collisions shows that hadron suppression is approximately constant within 6 &lt; p{sub T} &lt; 12 GeV/c. The ratios of charged hadron spectra at the two beam energies show a 15-20 percent increase in yield at low p{sub T}. At high p{sub T}, the ratios show a larger increase that agrees well with pQCD calculations of the {radical}(s{sub NN}) dependence of particle production in Au+Au collisions

History of the Book in Canada. Volume III : 1918-1980

"The History of the Book in Canada is one of this country's great scholarly achievements, with three volumes spanning topics from Aboriginal communication systems established prior to European contact to the arrival of multinational publishing companies. Each volume observes developments in the realms of writing, publishing, dissemination, and reading, illustrating the process of a fledgling nation coming into its own. The third and final volume follows book history and print culture from the end of the First World War to 1980, discussing the influences on them of the twentieth century, including the country's growing demographic complexity and the rise of multiculturalism." -- Front flap of jacket

Histoire du livre et de l’imprimé au Canada, Volume III

Au Canada, le XXe siècle inaugure une époque faste en matière de culture du livre et de l’imprimé. Après la Première Guerre mondiale, l’émergence de maisons d’édition indépendantes, d’associations d’auteurs, la création de prix littéraires et scientifiques et de subventions à la production, notamment au Québec, sont autant de signes de la vitalité du livre dans la transmission et la promotion d’une culture nationale, désormais projetée dans la durée et conçue comme un héritage essentiel. C’est ainsi que l’on peut voir se développer une culture du livre distincte de l’imprimerie et de la presse, où les éditeurs deviennent progressivement des architectes de la culture canadienne. Ce troisième volume de l’Histoire du livre et de l’imprimé au Canada couvre la période de 1918 à 1980, durant laquelle des transformations cruciales ont eu lieu. Ainsi, les deux grands groupes linguistiques du pays s’enrichissent de structures éditoriales distinctes, et grâce aux périodiques, les populations autochtones et les communautés ethniques et religieuses s’approprient les outils de la communication écrite pour exprimer leurs valeurs, affirmer leur appartenance sociale et créer des liens de solidarité. La Deuxième Guerre mondiale crée une demande nationale accrue pour le livre canadien qui se déploie alors sur la scène internationale. Au même moment, le cinéma, la radio et la télévision, phénomènes nouveaux, favorisent la pénétration d’une production de masse en provenance des États-Unis. L’affirmation d’une identité canadienne s’accentue encore dans les années 1960 au moment où les littératures canadienne et québécoise connaissent une période d’effervescence sans précédent. Enfin, après plus d’un siècle de luttes et de revendications, d’actions individu­elles et collectives, les gouvernements mettent en place des structures de soutien à la création littéraire et au livre qui en assureront l’essor au cours des années 1980

Direct observation of the dead-cone effect in quantum chromodynamics

The direct measurement of the QCD dead cone in charm quark fragmentation is reported, using iterative declustering of jets tagged with a fully reconstructed charmed hadron